Rough cold starts with engine misfire codes
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1st Gear
Joined: Sep 2019
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Rough cold starts with engine misfire codes
I own a 2016 chevy corvette Z51. I saved money over period of time and was excited until I started to have issues. I took car to local chevy dealer in NJ, with what was stored codes P0300 and P0308 told them about rough cold start, knock and flashing CE light. After checking, they said they did not see coolant in engine cylinders (which is suspect in my book) and diagnosed the issue to fuel injector for 8th cylinder and claim they replaced that. After few days of driving, I kept getting the same issue of white smoke from exhaust, slight engine knock at highway speeds (rpms constantly go up and down by almost 100-150 rpm) and rough idle starts with one time complete stall. Researched and found service bulletin #PIP5498B. I called GM customer service but was met with no offer to help from GM engineering, lack of knowledge and no empathy, which was more disappointing. Now I have the check engine light on again (this time with P050D) and no support from anyone, incl GM, which is a shame. Turning to my fellow corvette owners for help and direction to see anyone have had prior experiences that can help and hopefully better resolutions.
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From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
I own a 2016 chevy corvette Z51. I saved money over period of time and was excited until I started to have issues. I took car to local chevy dealer in NJ, with what was stored codes P0300 and P0308 told them about rough cold start, knock and flashing CE light. After checking, they said they did not see coolant in engine cylinders (which is suspect in my book) and diagnosed the issue to fuel injector for 8th cylinder and claim they replaced that. After few days of driving, I kept getting the same issue of white smoke from exhaust, slight engine knock at highway speeds (rpms constantly go up and down by almost 100-150 rpm) and rough idle starts with one time complete stall. Researched and found service bulletin #PIP5498B. I called GM customer service but was met with no offer to help from GM engineering, lack of knowledge and no empathy, which was more disappointing. Now I have the check engine light on again (this time with P050D) and no support from anyone, incl GM, which is a shame. Turning to my fellow corvette owners for help and direction to see anyone have had prior experiences that can help and hopefully better resolutions.
If you have a coolant pressure tester, you can probably try to diagnose yourself, but it's more than likely covered under warranty so a dealer should be able to get it figured out.
